Abstract
Mining frequent itemset generates frequently purchased itemsets. However, a frequent itemset may not be the itemset with high value. Mining high utility itemset considers both of the profits and purchased quantities for the items, which is to find the itemsets with high utility for the business. However, mining high utility itemsets from the whole database may lose the high utility itemsets in a specific time period. Mining high utility itemsets in different time periods considers when the itemsets will be high utility, which can provide business manager to promote high utility itemsets in a specific time period.
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